Herbal
Reza Changizi; Shayan Ghubadi; Zahra GhiyasVand; Mahshid ShamloFar
Abstract
In this study, we have investigated the effects of red hawthorn powder= Valik (RHP) (Crataegus monogyna) as a natural pigment sources and Astaxanthin as synthetic pigment source on growth, and skin color of Severum (Heros severus) with initially average weight 8.5 ± 0.57 for a period of 60 days. ...
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In this study, we have investigated the effects of red hawthorn powder= Valik (RHP) (Crataegus monogyna) as a natural pigment sources and Astaxanthin as synthetic pigment source on growth, and skin color of Severum (Heros severus) with initially average weight 8.5 ± 0.57 for a period of 60 days. Basal diet was supplemented with 0 (control), 1 g kg-1 Astaxanthin, 5, 15 and 25 g kg-1RHP in a totally randomized design trial in triplicate groups. The results showed significant differences in growth and skin color between control and treatment groups (P<0.05). There was a statistically significant increase (P<0.05) in growth performances level in group treated with 25 g kg-1RHP. The highest and the lowest growth performances were observed in control and 25 g kg-1RHP, respectively. Total carotenoid content of the fish was determined spectrophotometrically at the end of the experiment. As a result, a visible change of color in the skin of the fish fed on the feed containing Astaxanthin was observed with 0.58±0.2 mg g-1 of pigment accumulation while a relatively change of color was observed in the skin of other fish that were fed on the feed containing powder RHP with 0.54±0.2 mg g-1 of pigment accumulations, respectively (p>0.05). Therefore, it was determined that these pigment sources have an effect on the color of Severum fish.
